Water bottle cap



FIG. 1 is a perspective view of a water bottle cap showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a bottom perspective view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a front elevation view thereof.

The evenly broken lines are shown for the purpose of illustrating parts of the water bottle cap that form no part of the claim. The dot-dash broken lines represent the boundaries of the claim and form no part thereof. 

CLAIM The ornamental design for a water bottle cap, as shown and described. 